Using ResourceRequestBody as the type of HTTP body outside of //content.

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index e891e0a772e76797a356247e1a5a40616bd587b1..49ad3924611c9ef2862493e30b96fda1586e6970 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -664,7 +664,10 @@ void NavigationControllerImpl::LoadURLWithParams(const LoadURLParams& params) {
   switch (params.load_type) {
     case LOAD_TYPE_DEFAULT:
       break;
-    case LOAD_TYPE_BROWSER_INITIATED_HTTP_POST:
+    case LOAD_TYPE_HTTP_POST:
+      // TODO(lukasza): This assertion is false - it is also possible to POST to
+      // an chrome-extension://... URI.  This might be more common when
+      // allowing renderer-initiated POST after fixing https://crbug.com/344348.
       if (!params.url.SchemeIs(url::kHttpScheme) &&
           !params.url.SchemeIs(url::kHttpsScheme)) {
         NOTREACHED() << "Http post load must use http(s) scheme.";
@@ -763,10 +766,9 @@ void NavigationControllerImpl::LoadURLWithParams(const LoadURLParams& params) {
   switch (params.load_type) {
     case LOAD_TYPE_DEFAULT:
       break;
-    case LOAD_TYPE_BROWSER_INITIATED_HTTP_POST:
+    case LOAD_TYPE_HTTP_POST:
       entry->SetHasPostData(true);
-      entry->SetBrowserInitiatedPostData(
-          params.browser_initiated_post_data.get());
+      entry->SetPostData(params.post_data);
       break;
     case LOAD_TYPE_DATA:
       entry->SetBaseURLForDataURL(params.base_url_for_data_url);